Automatic stop for phonographs



Dec. 18,1923. 1,4727% E. E. WIFORD AUTOMATIC STOP FOR PHONOGRAPHS v Filed May 20, 1922 2 Sheets-Sheet 1 Dec. 18 1923. 1,477,739

- v E. E. WIFORD AUTOMATIC STOP FOR PHONOGRAPHS Filed May 20, 1.922 2 Sheets-Sheet 2- Patented Dec. 18, 1923 ELZA'E. WIFORD, F SIDNEY, OHIO.

AUTOMATIC STOP FOR PHONOGBAPHS.

Application filed May 20, 1922.

ToaZZ whom it may concern: Be ,itlknown'th at I, ELZA E. WIFORD, a citiaen of the United States, residing at, Sidney, in the county of Shelby and State of e 'Qhio, haveinvented certain new and useful Improvements m I' Automatic Stops for Phonogr'aphsjandl do hereby declare the following to 'be a full, clear, and exact description of the invention'fsuch as'will en- 0 able otherslsikilledfin'thewart to Which it appertaifisttqaakeiaad. use the same.

This'finventio'n' relates to automatic stops orfbrake for phonographs or similar insti;1'1nient"s,;;- f t Anfobjec't for the: present invention is ,to provid'eij anjimprovedf simplified automatic stoppfthejcharacter indicated. 'A further object is to, providea device of the characterfindioat' d embodyinga novel, improved control, 'devicefurther object ofthe present inventionis toprovidea device of the character indicated in a, compact, easily assembled form; Further objects will appear-Kn the course of the following detailed description' 'llie, invention consists ll'lithe novel construction, arrangement and combinations of parts hereinafter more particularly described'and claimed..- i

Twosheets of drawingsraccompany, this specification as part thereof, in which like refenence' characters indicate similar parts throughout.

Figurelis a plan viewofthe top of a phonograph, parts, being; broken away to showwthe automatic stop device, the device being shown withtthe brake in looking engagement with the flange of the rotary disc; Fig. 2 is a; ,top plan-view similar v to Fig. 1, the device being illustrated in an intermediate position, thebrake being out of .engagement with the flange'of the rotary disc but in 'positionto .be automatically released: It'ig. 3 i sa pl n View similar'to the precedingfigures, showing the brakereleased and inlqeking engagement with the flange of the rotarydisc, and J p igm; 4c, is: a fragmentary vvertical section taken on theline 4+4EofQFig, 1.

,The lpresent invention 7 is particularly adapted forfapplication tophonogr'aphs emborl ying, as illustrated in the drawings a a e,iten amhi hri ri te -1 y mo n swinging sound conductor arm, B carrying Serial No. 562,406.

a reproducer C and a stylus D. The arm B will be hereinafter referred to as the moving part. A suitable motor, not shown, is provided to rotate a vertical shaft F, carrying a disc E havin a downwardly turned flange 37, the disc lE being adapted to receive a sound record R having a spirally arranged sound groove'S extending from adjacent the circumference to a circular groove adjacent the center. The structure thus briefly outlined is well known and in common use in instruments of this character.

The object of the present inventionis to provide an automatic braking device to control the rotation of shaft F relatively to the movement of the moving part B so that when the stylus D, which is in engagement with the groove S of record R has been moved transversely of the record to the inner circular groove, a brake will b automatically released to stop the rotation of the shaft F and hence the record R.

A further objectis to provide in connec tion with such an automatic stop, means for controlling the automatic device so that in the preliminary movement of setting the stylus D in .the outer grooves at the commencement of the operation, the moving arnrB may be freely moved backwards and forwards to a limited degree without releasing the brake mechanism and which will also permits the maintenance of the braking mechanism in operative or set position during this preliminary stage and after the machine is set in operation irrespective of the speed of rotation of the record which is lower than normal during the first stages.

To accomplish these objects, I provide an auxiliary base plate 1 adapted to be secured to the top of the phonograph by screws 2, and under the rotary disc E, as is illustrated. Mounted on plate 1 are spaced pivot carry ing brackets 3 to which is mounted a shaft 4 carrying a gear 5 adapted to mesh with a worm gear 6 carried by shaft F and also carrying a screw. gear 7 adapted to engage teeth 8 of a rotary friction disc 9. A complementary friction disc 10 is pivotally mounted over and in contact with friction disc 9 and above the complementary friction disc 10 is rotatably mounted a brake member l5fprov'ided with acatch notch 16 and carrying-a engage flange 37 of disc E to brake the brake shoe 2% adapted to same. Over brake member is pivotally mounted a lever 11 having a short arm 12, said lever 11 being pivotally connected as by a link 13 to moving part B as by a pivot 11. Brake member 15 is connected with lever arm 11 by means of a spring 26 tending to normally draw brake shoe 2 1 into engagement with flange 37. The frictional discs 9 and 10 together with brake member- 15 and V lever 11 are mounted on a common pivot shown as screw 30.

Upon the complementary friction disc 10 a catch member 18 having hook 17 adapted to engage catch notch 16 of brake '15 is pivotally mounted as at 19 and connected as by a pivot 20 to the short arm 12 of'lever 11. Intermediate pivots 1 9 and 20 a short transverse slot 21 is provided inthe short 'arm 12 to receive a pin 22 carried by catch member 18 and adapted to limit the motion 'ofcatch 18 relative to pivots 19 and 20.

V Adjacent the circumference of frictional members 9 and 10 and also ad acent catch 18 1s pivotally mounted a control member 31 pivoted to plate 1 as by a screw 32. This control member 31 carries a pin 35 adapted to play within a notch 3-1 out in the periphery of a guide washer 33 to control and limit the stroke of the control member 31. A spring 36 is. provided tending to normally press control member 31 against catch 18 as illustrated in Fig. 1. The slot 31 in washer 35 is so adjusted, however, as to pre vent control member 31 from engaging brake member 15 even in its most extreme downward position as illustrated in Fig. 2. In operation, the moving part B is moved to its extreme outermost posit-ion, as illustrated in Fig. 1, rotating lever 11 by means of link 13 and through lever. 11 and arm 12, rotating frictional plate 10, together with catch 18 and through catch 18 the brake member 15, all into the positions illustrated in Fig. 1, showing the brake shoe 24; in locking engagement with the flange 37 of rotary disc E. The position thus illustrated and described shows the automatic brake device set and the brake in operative position. Upon movement of the moving part B toward the circumference of the disc, in order to place the stylus D in the outermost grooves of the record, it will be apparent that lever 11 will be rotated in a counter clockwise direction at the same time rotating friction disc 10 through the connections of lever arm 12 and. catch 18 and pulling brake member 15 by means of hook 17 in engagement with notch 16 until the brake shoe 24c is withdrawn from con tact with the flange 37, thus permitting the rotary shaft F to revolve with the rotary disc through counter shaft 1, rotate friction disc 9 alsoin a counter clockwise direction and at the same or a lower speed than friction by the movement of moving E. The rotation of shaft- F will,

disc 10, which will continue to be rotated through the feeding in of stylus 1) toward the center of record It by means of the spiral sound groove S. C 2

When the stylus D has reachedthe central circular groove of the record its transverse movcment over the record ceases and hence the movement otlever 11. Friction gear 10' will-however, continue to advance in a counter clockwise direction by reason of its frictional contact with the friction disc 9 operated by rotarypart F. This continued movement. of friction disc 10-will advance pivot 19 ofcatch 18 ,relativeto pivot 20, thus withdrawing hook 17 from notch 16 of brake member15 and releasing brake m'emberglo which under the tension of spring 26, will rebound into locking engagement with flange 37 of the disc E, thus stopping the rotation of said disc and the motorgas illustrated in Fig. 3.

In association with the operation thus described, it will be noted that in the initial position of the apparatus as illustrated in Fig. 1, the control member 31 is in engagement with the catch 17, tending to hold saidcatch in lockingengagement withthe brake member 15 regardless of the relativetensions on pivots 19 and20 as they may be effected V arm B which may be moved backwards and forwards without releasing the catch. 970 also the relative speed of moving part B and record R is immaterial solong. as control member '31 thus engages catch 18. As this control "member, however, 18 so ad3usted with relation to pin 35' and notch 34: that it cannot contact with brake member 15, it will be obvious that as the moving part B advances over the i'ecord into the position illustrated in Fig. 2, catch 18 passes from engagement with control member31 and thereafter any modification of thetension on pivots 19 and 20 will operate to release the brake as previously described.

Various modifications and arrangements of the elements above described will readily suggest themselves to those skilled. in the art, but all within the scope of'thepresent invention.

Having thus fully tion, I claim: v

1. An automatic stop for phonographs described my invenand the like having a rotary part, a moving part and a brake. comprising a member ro' tated from the rota'rypart, a complementary member rotated by the movingjpart. a catch member to control the brake carried by the complementary member and means operated by the moving part to rotate said complementary member and to effect the catch.

2. An automatic stop for phonographs and the like havingfa rotary part, a moving part and a brake, comprising a member rotated from the rotary part, a complementary the brake pivoted member adapted to be rotated by the movin part, a catch controlling the brake pivoted on said last mentioned member, the breaking of which toggle will operate to release the brake.

3. An automatic stop for phonographs and the like having a rotary part and a moving part, comprising a base, a part operated from the rotary part, a complementary part adapted to be operated from the moving part, a brake member and a lever connected with the moving part, said parts, brake member and lever being all concentrically mounted on the frame, spring means ii connecting the brake member and lever tending to throw the brake member into locking position, and a catch member controlling to the complementary part and to the lever forming a toggle therewith through which the last mentioned member may be rotated and by the breaking of which toggle the catch is withdrawn from engagement with the brake member.

4. An automatic stop as described in claim 1, in combination with independent means for retaining the catch in engagement with the brake member during a predetermined part of the movement of the moving part.

5. An automatic stop as described in claim 1, in combination with a tension member operating on the catch member during a predetermined part of the movement of the moving member to retain the catch in engagement with the brake irrespective of the movement or the non-movement of the moving part.

6. An automatic stop as described in claim 1, in combination with a pivoted member, spring means operative of the pivoted memher, and stop means limiting the rotation of the pivoted member, said pivoted member adapted to engage the catch member to control it independently of the moving part during a predetermined period of the latter motion.

7. An automatic stop for phonographs and the like having a rotary part and a moving part, comprising a base, a part operated from the rotary part, a complementary part adapted to be rotated from the moving part, a brake member and a lever connected with the moving part, said parts, brake member and lever being all concentrically mounted on the frame, spring means connecting the brake member and the lever tending to throw the brake into locking position a catch controlling the brake member pivoted to the complementary part, and to the lever forming a toggle therewith and a control member pivoted to the Frame adj acent the catch, spring means to throw the control member against the catch member to retain the latter in engagement with the brake member and stop means for limiting the throw of said control member, substantially as specified.

In testimony whereof I afiix my signature.

ELZA E. WIFORD. 

